Abstract: Useful copolymerizable compositions include 10 to 50 parts by weight of (I) a polymerizable diurethane monomer having the general formula ##STR1## wherein R.sub.1 is --H; or --CH.sub.3 ;R.sub.2 is --H; --CH.sub.3 ; or --C.sub.2 H.sub.5 ;R.sub.3 is an organic radical constituting the residue of a mono-hydroxy compound R.sub.3 OH having from one to twelve carbon atoms; andR.sub.4 is a divalent organic radical constituting the residue of an organic diisocyanate R.sub.4 -(NCO).sub.2 from which the two isocyanate radicals have been removed;And 90 to 50 parts by weight of (II) a polymerizable polyurethane monomer which is the reaction product of (a) an organic diisocyanate; (b) a beta-hydroxy alkyl ester of an acrylic acid; and (c) a polyol.

Abstract: Multiple layer light transmissive laminates and a method for making them. Such laminates are particularly adapted for use as glazing materials. The laminates retain light transmissivity after exposure to elevated temperatures. The laminates include two or more layers of light transmissive sheets such as glass, polymerized methylmethacrylate and the like, bonded together by means of a thermosetting resin which is cured in the absence of free oxygen and in the absence of oxygen-generating polymerization initiators. The curing is achieved by means of radiation energy delivered through at least one light-transmissive sheet into the resin.